wordpress-mobile/WordPress-iOS — pull request #2757 by koke (2014-11-11 13:00:17+00:00)
Title: Fix issue with keychain storage

Since we weren't asking for any return data, SecCopyMatching would
return a successful status code, but no data.

We would in turn pass that empty dictionary as the update query,
effectively replacing the password of every item in the keychain.

Fixes #2756

/cc @astralbodies